Pernickety Definition Meaning Synonyms Fussy importance is rather difficult to understand. It refers to someone who is exceedingly particular and fault-finding. A persnickety individual frequently pay strict attention to detail and sets the bar high when it comes to criteria and flawlessness. Their fastidious nature can be viewed as laudable, but it can also magnify unreasonable censure and unjustified dissatisfaction. Being persnickety is frequently connected with precise focus on specifics but can also be seen as a form of pedantry.